Electromagnetic Environment Quiz

<p>The ability of conductors to radiate electromagnetic waves due to their shape and size. (C)</p> Signup and view all the answers

<p>From 9 kHz to 1.8 GHz (B)</p> Signup and view all the answers

<p>Due to the rapid switching of transistors or diodes (C)</p> Signup and view all the answers

<p>It could enhance another coupling path unintentionally. (C)</p> Signup and view all the answers

<p>Aluminum foil laminated to polyester or polypropylene film (B)</p> Signup and view all the answers

<p>To reduce crosstalk between individual pairs (B)</p> Signup and view all the answers

<p>Maximum shield efficiency across the frequency spectrum (D)</p> Signup and view all the answers

<p>Multi-shielding (B)</p> Signup and view all the answers

<p>Increases signal strength (C)</p> Signup and view all the answers

<p>Reducing entry windows and ensuring adequate surface conductivity to ground (C)</p> Signup and view all the answers

<p>Absorption of the energy by the shielding material (A)</p> Signup and view all the answers

<p>To prevent radiation from entering the system at the connector interface and defeating the shield's purpose (C)</p> Signup and view all the answers

<p>Ferrous braided shields (A)</p> Signup and view all the answers

<p>The combination of mesh count, wire diameter, and braid material (D)</p> Signup and view all the answers

<p>Higher braid coverage is more effective against high-frequency emissions (A)</p> Signup and view all the answers

<p>Tin-plated copper (A), Nickel-plated copper (C)</p> Signup and view all the answers

<p>To reduce EMI from reaching the conductors (A)</p> Signup and view all the answers

<p>High structural integrity and flexibility (D)</p> Signup and view all the answers

<p>The length of the cable (B)</p> Signup and view all the answers

<p>Protecting the airframe from hazardous surges (C)</p> Signup and view all the answers

<p>Use of conductive mounting bolts (D)</p> Signup and view all the answers

<p>To prevent potential interference with onboard communication systems (D)</p> Signup and view all the answers

<p>Digital cameras (D)</p> Signup and view all the answers

<p>To minimize the impact of electromagnetic interference on sensitive avionics (B)</p> Signup and view all the answers

<p>The lack of shielding for critical wiring (C)</p> Signup and view all the answers

<p>They have the potential to interfere with sensitive navigation and communication equipment. (B)</p> Signup and view all the answers

<p>To provide a path for lightning currents (C)</p> Signup and view all the answers

<p>Greater than 10 kHz (A)</p> Signup and view all the answers

<p>A foil wrap shield followed by a braided shield (B)</p> Signup and view all the answers

<p>Interference caused by cables operating at different frequencies, prevented by isolating wires with a shield. (B)</p> Signup and view all the answers

<p>Industrial motors, welding equipment, and elevators (B)</p> Signup and view all the answers

<p>Using a non-ferrous braid shield with moderate coverage and a shared ground (C)</p> Signup and view all the answers

<p>Shielding with a non-ferrous braid and proper isolation (A)</p> Signup and view all the answers

<p>Plating case skins, increasing shield material density, and eliminating line-of-sight entry points (D)</p> Signup and view all the answers

<p>The frequency of the interfering signal (D)</p> Signup and view all the answers

<p>Combination foil wrap and braided shield (A)</p> Signup and view all the answers

<p>Magnetic fields (A)</p> Signup and view all the answers

Paths by which electric and magnetic fields interact or transfer energy.

A field created by electric charges, existing with one pole.

A field generated by magnetic materials, existing with two poles.

The force that propels charges in an electric field.

All conductors leak electric and magnetic fields into the environment.

Frequencies commonly used in daily life range from power lines to mobile phones.

Noise emitted by electrical devices that can interfere with signal integrity.

Aluminium foil laminated to polyester or polypropylene for shielding.

Minimizing unwanted transfer of signals between conductors.

Combining multiple shielding types for better signal protection.

Noise that disrupts electrical signals in conductors.

Improves protection against interference and environmental noise.

The process of connecting airframe components using riveted or bolted joints.

Additional bonding needed for external parts like control surfaces to ensure stability and safety.

System to safely channel lightning strikes away from sensitive aircraft parts to prevent damage.

Devices that intentionally emit radio frequency signals which can interfere with avionics.

Bans on certain electronic devices during flight to protect avionics systems.

Devices like laptops that can unintentionally produce signals affecting avionics.

The risk of malfunctioning avionics caused by signals from personal devices.

Risk of interference due to wiring located inside the aircraft fuselage.

Insulating materials like fiberglass that provide no shielding against EMI.

Interference from devices operating in the radio wave spectrum above 10 kHz.

Interference caused by bundled cables operating at different frequencies/voltages.

Devices like motors, welding equipment, and elevators causing EMI.

Methods to protect equipment from EMI using materials like ferrous braids.

Sudden spikes of high voltage that can damage sensitive equipment.

A shield that helps in controlling interference without using ferrous materials.

The protection around cables to prevent electrical noise interference.

The ability of electromagnetic waves to pass through materials.

The thickness or strength of shield materials to block interference.

Electromagnetic waves in the range of 1 to 30 kHz.

Electromagnetic signals above 30 kHz.

The use of conductive materials to protect cables from EMI.

Electromagnetic interference that can disrupt electronics.

Materials that allow the flow of electricity and can shield cables.

Flexible shields made of braided material to minimize EMI.

Connecting the shield to the connector to prevent EMI leaks.

The reduction of signal strength as it passes through the shield.

The number of strands in the braided shield that affects its performance.

Combinations of different materials used in shielding, like metallised Kevlar.